<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>eventSource</title>
</head>

<body>
  <div id="root"></div>
  <script>
    const es = new EventSource('/ajax');
    es.onmessage = ev => {
      let li = document.createElement('li')
      li.innerHTML = ev.data
      document.querySelector('#root').appendChild(li)
    }
  </script>
</body>

</html>